Vulcanizer.



' (No Model.)

8. A. BROWN.

V U L CA N I Z E R.

(Application filed Feb. 19, 1897.)

Patented Aug. 8, I899.

2 Sheets-Sheet l.

No. 630,650 Patented Aug. 8, I899.

s. A. B ROWN. VULCANIZER.

(Application filed Feb. 19, 1897.) {No Model.) 2 Sheets $heet 2.

fly. 1 4 c f- 1 i if 4,,

H ,75 U a Witnesses. Inve nfo'r,

UNITED STATES *PATENT OFFICE.

SETH A. BROWN, OF BUFFALO, NEW YORK, ASSIGNOR TO THE BUFFALO DENTAL MANUFACTURING COMPANY, OF SAME PLACE.

VUJLQANIZER.

ESPEOIFIGATION for ing part of Letters 1mm No. 630,650, dated August 8, 1899. Application filed February 19,1397. Serial No. 624,259. (No model.)

ToaZZ whom it may con/aeriaand State of New York, have invented certain new and useful Improvements in Vulcanizers for Dental and other Purposes, of which the following is a specification. i

My invention relates to certain improvements, as hereinafter claimed, by which the apparatus may be cheaply and durably constructed, be easy of operation, and not liable to get out of order.

In the accompanying drawings, showing the construction of the apparatus with some modifications thereof, Figure 1 is an outside view or elevation; Fig. 2, a View, partly in section, taken through the dotted line a m, Fig. 3, showing section of pot and cover, frame, and supporting-lugs and part section of clamp-bar, means of journaling the clamp to the frame, and the screw tofasten the cover on the pot. Fig. 3 is an elevation at right angles to Fig. 1, showing by dotted lines the clamp swung downward; Fig. 4, a general top view 3 Fig. 5, a top view of base or frame, showing guides and supporting-lugs; Fig. 6, a top view of modified form of base or frame; Fig. 7 ,a sectional View of base or frame; Fig.

8, a sectional View of modified form of base or frame, showing supporting-ring and guides; Fig. 9, another modification showing base or frame in section, with supporting-ring partly in section; Fig. 10, atop view of supportingring; Fig. 11, a side view of supporting-ring at right angles to View in Fig. 9; Fig. 12, a sectional View of modified form of clamp-joint or bearing with the frame. Fig. 13 shows a portion of the top of clamp-bar, partly in section and the cover in section, with ball-bearing, all enlarged; Sheet 2, Fig. 14, general View, enlarged, showing modified form of ball-bearing clamp. Fig. 15 shows leg 2 of ball-bearing clamp; Fig. 16, a leg or bolt of clamp; Fig. 17, a top view of clamp.

My invention differs principally from previous devices in that the pressure of the clamp or clamping device is brought to bear upon the bottom of the pot instead of upon a collar brazed upon the pot atits top. A ballbearing for the clamp-screw is also a novel feature of construction.

of the former.

, v The base or frameA is preferably cast of Be it known that I, SETH A. BROWN, residing in the city of Bufialo, in the county of Erie common or of malleable iron, and has three or more internal ribs 1) b b b '(in the drawings four are shown) to act as guides to retain the ,5 5 .pot B in the center thereof. At or near the bottom-of said ribs are lugs b preferably cast integrally therewith, for the purpose of supporting the bottom of the pot B, thus leaving a space between the pot and frame or jacket 6 for the heat to rise and pass over the surface One of said ribs b*, as shown in Figs. 7 and 8, can beseparate from the frame A at or near the lugs b or the ring J, (in the modification,) but movably attached to the frame by means of rivets long enough to permit it to have a slight motion horizontally. The frame can be tapped at or near the middle of this detached rib b and a thumbscrewi inserted therein. The latter is adapted to bear against the rib and force it away from the frameA and against the pot B for the purpose of temporarily securing the latter in the frameA while the cover C is being pried off. Two holes are'boredin opposite sides of the frame A to receive the pins or journals 0.

(it of the clamp D.

The pot B can be made in any suitable way; but it is preferably stamped or drawn out of a solid piece. It can have a ring brazed on So its upper end, if desired, to form a wide face for the packing-joint, or, as in the present case, be left straight and uniform throughout, thus retaining the original strength and temper, which would otherwise be lost by brazing. A gas-burner or other suitable heater can be placed under it in the frame A.

The cover C can be tapped to receive a suitable steam-gage, thermometer, safety-valve, blow-off, and gas-regulator, as in the usual preferred form of construction. It can be slightly countersunk to receive theend of the binding-screw E, or, as shown in Fig. 13, have a ball-race in it stop for antifriction-balls c, which are held in place by a suitable ring e. 5 It has the usual annular groove in its lower side for holding the steam-packing and to receive theend of the pot B. 4

The clamp D has a screw E, handle F, and legs (1 d, which latter can be sprung slightly 1 00 to permit the pins a a to enter the holes or hearings in the frame A. It will be seen that the clamp can be swung downward and out of the way. When in position over the cover 0, the screw E can be turned by a suitable wrench, thus closing the joint between the cover and the pot. Said screw can bear directly upon the cover, as shown in Fig. 2; but I prefer to have it bear upon the balls 0, as shown in Fig. 13, because this method reduces the friction which would otherwise exist between the cover and the screw.

The balLbearing for the clamp-screw is not limited to the particular form of clamp shown, but may be applied to a great variety of crossbar vulcanizers.

I11 a modified form instead of the screw E bearing upon the balls in the cover a nut and bolt clamping device may be used having balls interposed between the nut and clamp-bar. One such device is shown on Sheet 2 of the drawings in Figs. 14, 15, 16, and 17, in which the clamp-bar 1 has a slight projection on its lower side adapted to bear on the cover 0, has a leg 2 hinged at one end by a pin 6, so as to be movable in a plane parallel to its length, and has a bolt-hole with a ball-race encircling it, in which antifriction-balls are placed. It can have a handle F attached. The leg 2 is forked at its top to receive the bar 1 and is hinged to the frame A by a screw 8 passing through its lower end, or in any suitable manner, so as to permit it to swing in a plane at right angles to the length of the bar 1. The threaded leg or bolt 3 is hinged to the opposite side of the frame A by the screw 8 and is adapted to pass through the bolt-hole in the bar 1. A conical-faced nut 4 (shown in section) is screwed onto the bolt 3 and is adapted to bear against the balls 0 0, thus forcing the bar 1 downward onto the-cover O. This form of clamp is very powerful on account of the leverage, the pin 6 acting as a fulcrum. The entire clamp can be swung downward out of the way. It will thus be seen that in consequence of the pressure or strain coming on the entire length of the pot and on the bottom thereof greater resistance is offered than if the strain were placed upon a narrow collar, as in the usual form.

Among various other modifications which maybe mentioned are those shown by Figs. 6 and 8. Instead of pot B being supported by the lugs b it is supported by a ring J, formed near the lower part of the ribs 1) and smaller than the inside of the base or frame, so as to allowa space for the heat to rise. As shown by Fig. 8, the loose guide I) can be actuated by means of a cam-lever K instead of the thumb-screw i, Fig. 7.

As shown by Figs. 9, 10, and 11, the pot B, instead of resting on the ring J or lugs b rests in a separate ring G, having an internal flange g, and the pins a a of the clamp D enter the holes 0 o. The standard or base H has lugs 7L 72 for supporting the ring G and its contents and has a jacket I, preferablyof sheet metal, fitted to its upper part for the purpose of retaining theheat. Bythisarrangementthepotl3,covcr C, and clamp D can be lifted out together when desired.

As shown in Fig. 12, instead of the bearings or pins a a being in one piece with the legs (I d, the latter are bored transversely at their lower ends and receive a screw a, which enters the frame A. The frame A or ring G can be elements of various sorts of clamping devices, as may hereinafter suggest themselves. I therefore do not limit myself to the particu lar form of clamp shown.

In the clamping device used to retain the pot in the frame I do not limit myself to the rib and clamp shown, but the ribs can all be cast integrally with the frame, the screw or cam be put in any suitable place, and a separate movable shield be used in a similar manner and for the same purpose as the detached rib 11 or the cam or screw can bear directly against the pot; but I prefer a shield between to prevent wear and damage.

I claim 1. The combination of a pot or boiler, a cover for the same, a base or frame for supporting the bottom of the pot or boiler and a suitable clamp attached to said base or frame and adapted to secure the cover on the pot.

2. The combination of a pot or boiler, a cover for the same, a hollow base or frame for supporting the bottom of the pot, ribs or guides on the inside of said base or frame for retaining the pot in the center thereof and a clamp attached to the base or frame and adapted to hold the cover on the pot.

3. The combination of a pot or boiler, a cover for the same, a hollow base or frame having internal lugs for supporting the bottom of the pot, and a clamp attached to the base or frame to hold the cover on the pot.

4E. The combination of a pot or boiler having its periphery or shell of an approximately uniform thickness, a cover for the same, a base or framefor supporting the bottom of the pot, and a clamp attached to said base or frame for holding the cover on the pot.

5. The combination of a pot or boiler, a cover for the same, a hollow base or frame for supporting the bottom of the pot, means for securing the pot therein and a clamp attached to said frame and adapted to secure the cover on the pot.

6. The combination of a pot or boiler, a cover for same, ahollow base orframe adapted to support the bottom of the pot, a loose rib or piece in the interior of the base or frame adapted to be forced against the pot, and a clamp attached to the base for holding the cover on the pot.

7. The combination of a pot or boiler, a cover for the same, a hollow base or frame for supporting the bottom of the pot, and containing a loose rib or piece, a screw inserted in the periphery of the frame and adapted to bear against said rib or piece and a clamp attached to the frame for the purpose set forth.

8. In a vulcanizer a hollow base or frame, a pot and cover adapted to be supported therebase for supporting said pot, a screw-clamp connected with said frame or base, and balls interposed between the cover and the bind ing-screw of said clamp for the purpose set forth.

SETH A. BROXVN.

vVitnessesi v JAMES SANGSTER,

'L. SPONG. 

